package com.test.book.chapter1;

import com.rabbitmq.client.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * Created with IntelliJ IDEA.
 * Description:
 *
 * @author liuziyang
 * @create 2020-11-16 22:22
 */
public class RabbitConsumer {
    private static final Logger LOGGER = LoggerFactory.getLogger(RabbitConsumer.class);
    private static final String QUEUE_NAME = "queue_demo";
    private static final String IP_ADDRESS = "localhost";
    // RabbitMQ默认的服务端口号就是5672
    private static final int PORT = 5672;

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        Address[] addresses = new Address[]{new Address(IP_ADDRESS, PORT)};
        ConnectionFactory factory = new ConnectionFactory();
        factory.setUsername("guest");
        factory.setPassword("guest");
        // 这里的连接方式与生产者的demo略有不同
        final Connection connection = factory.newConnection(addresses);
        final Channel channel = connection.createChannel();
        // 设置客户端最多接收未被ack的消息的个数
        channel.basicQos(64);
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag,
                                       Envelope envelope,
                                       AMQP.BasicProperties properties,
                                       byte[] body) throws IOException {
                LOGGER.info("recevie message : {}", new String(body));
                try {
                    TimeUnit.SECONDS.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };
        channel.basicConsume(QUEUE_NAME, consumer);
        // 等待回调函数执行完毕之后，关闭资源
        TimeUnit.SECONDS.sleep(5);
        channel.close();
        connection.close();
    }
}
